Horn circuit for Audi A4 B6 (2000-2006)

BLK WIRE BRN WIRE COMPUTER DATA LINES SYSTEM FUSE 40 FUSE HOLDER (LEFT END OF DASH) GRN WIRE GRN/YEL WIRE HIGH TONE HORN HORN RELAY (9-PIN RELAY CARRIER) HORN SWITCH HOT AT ALL TIMES LOW TONE HORN NCA WIRE ORG/BRN WIRE ORG/GRN WIRE RED WIRE RED/YEL WIRE STEERING COLUMN ELECTRONIC SYSTEMS CONTROL MODULE (IN TOP OF STEERING COLUMN) TELEPHONE/TELEMATIC CONTROL MODULE (NEAR BASE OF RIGHT FRONT SEAT) VEHICLE ELECTRICAL SYSTEM CONTROL MODULE (BEHIND LEFT SIDE OF DASH) WHT WIRE YEL WIRE